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Avalanche Forecast

Archived

Dec 8th, 2025–Dec 9th, 2025

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Ningunsaw, Ningunsaw, Ningunsaw.

New storm snow and strong winds will make dangerous avalanche conditions, especially at higher elevations.

Stick to low-consequence, conservative terrain.



Confidence

Low

Avalanche Summary

No new avalanches reported, but we suspect a natural avalanche cycle occurred and suspect touchy storm and wind slabs will exist on Tuesday.

Snowpack Summary

The recent storm brought up to 30 cm of new snow building fresh storm slabs at upper elevations. Expect to find deeper deposits of wind loaded snow on leeward slopes. The new snow sits 40 to 70 cm above a layer of weak, feathery surface hoar crystals.

A 2 to 10 cm thick rain crust can be found down 50 to 100 cm at 1400 m and below.

At treeline we expect a snow depth of 250 cm or more. Snowpack depth tapers with elevation to around 50 cm at valley bottoms.

Many early season hazards are just below the surface below treeline.

Weather Summary

Monday Night
Mostly cloudy. 5 to 10 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -11 °C.

Tuesday
Mostly cloudy. 3 to 5 cm of snow. 20 km/h southwest ridgetop wind. Treeline temperature -13 °C.

Wednesday
Mostly cloudy. 15 cm of snow. 10 km/h southwest ridgetop wind. Treeline temperature -14 °C.

Thursday
Sunny. 10 km/h west ridgetop wind. Treeline temperature -21 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Travel in alpine terrain is not recommended.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.